Tuchanka
Tuchanka is a planet in the Mass Effect setting that is the homeworld of the krogan civilization.
History
Pre-industrial Tuchanka was a world teeming with life, much of it large and predatory. The krogan were the only sapient species on the planet, but even with their superior intelligence, only one newborn krogan in a thousand could expect to survive to maturity amid the hungry megafauna of Tuchanka.
Being very tough humanoids with an extremely high reproductive rate, the krogan managed to survive in this harsh environment long enough to develop advanced weapon technology. Superior weaponry reduced the threat of Tuchanka's native predators, but the krogan soon found themselves competing with each other for resources. This competition ended in a nuclear war that devastated Tuchanka's environment.
Even in the aftermath of a global nuclear war, many of the highly adaptable species of Tuchanka survived. The krogan population was kept in check by the fierce competition for the remaining resources until the salarians "uplifted" them.
Invasive Species
A few of Tuchanka's native species have escaped the planet to become threats on many other worlds, including the following:
- Krogan
- Varren
- Thresher maws
- Klixen
- Harvesters